package com.sun.java.Collection;

import java.util.*;

public class FindDups2 {
	
	 public static void main(String[] args) {
	        Set<String> uniques = new HashSet<String>();
	        Set<String> dups    = new HashSet<String>();

	        for (String a : args)
	            if (!uniques.add(a))
	                dups.add(a);

		// Destructive set-difference
	        uniques.removeAll(dups);

	        System.out.println("Unique words:    " + uniques);
	        System.out.println("Duplicate words: " + dups);
	    }


}
